Preparation And Properties Of Manganese/Copper Oxides And Conductive Polymers Co-loaded Papers

In this paper,cellulose fibers(CFs)were used as substrates,and manganese/cuprous dioxides and conductive polymers(CPs)were successively loaded on CFs by two-step in-situ synthesis method to prepare functional composite paper.The materials were characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS)to prove the successful preparation of the composite papers such as PANI/MnO2@CFs,PPy/MnO2@CFs,Cu2O/PANI@CFs and PPy/Cu2O@CFs.Manganese/cuprous dioxides(manganese dioxide and cuprous oxide)and CPs(polyaniline(PANI)and polypyrrole(PPy))were successively in situ loaded on CFs,and the composite papers having formaldehyde-removing property were successfully prepared.The amount of aniline or pyrrole added was changed to investigate the differences in formaldehyde removal performance of the composite papers.The results showed that the catalytic oxidation and photocatalytic reactions simultaneously took place for formaldehyde removal by the PANI/MnO2@CFs and PPy/MnO2@CFs composite papers,and formaldehyde removing effect was remarkable.Under normal temperature,normal pressure and visible light conditions,the formaldehyde removal ratios of the two composite papers increased first and then decreased with increasing the amount of aniline or pyrrole added within 4 h of irradiation time.When the amount of aniline added was 1 mL and the amount of pyrrole added was 1.5 mL,the formaldehyde removal ratios of PANI/MnO2@CFs and PPy/Mn02@CFs composite papers reached 96,6%and 76.30%,respectively.PANI and cuprous oxide were in situ loaded on CFs,and a composite paper having formaldehyde removal performance was prepared.By changing the amonut of aniline or copper sulfate added,the difference in formaldehyde removal performance of the composite paper was investigated.The results showed that the formaldehyde removal ratio of Cu2O/PANI@CFs composite paper increased first and then decreased with increasing the dosage of copper sulfate when aniline dosage was fixed at 1 mL and irradiation time was 4 h.When copper sulfate dosage was 4 g,the formaldehyde removal ratio reached a maximum of 82.78%.When the dosage of copper sulfate was fixed at 4 g and irradiation time was 4 h,the formaldehyde removal ratio also increased first and then decreased with the increase of aniline dosage.The formaldehyde removal ratio reached the maximum 89.42%when the amount of aniline added was 1.5 mL.PPy and cuprous oxide were in situ loaded on CFs,and the composite paper with formaldehyde-removing property was prepared.The amount of pyrrole or copper sulfate added was changed to investigate the difference in formaldehyde removal performance of the composite paper.The results showed that the formaldehyde removal ratio of PPy/Cu2O@CFs composite paper increased first and then decreased with the increase of pyrrole dosage when the amount of copper sulfate added was fixed 4 g and the irradiation time was 4 h.When the amount of pyrrole added was 2 mL,the formaldehyde removal ratio reached a maximum of 86.18%.When the amount of pyrrole added was fixed at 2 mL and the irradiation time was 4 h,the formaldehyde removal ratio also increased first and then decreased with the increase of copper sulfate dosage.The formaldehyde removal ratio was a maximum of 86.47%when the amount of copper sulfate added was 4 g.In order to investigate whether the deposition sequence of PPy and cuprous oxide had an effect on the photocatalytic efficiency,Cu2O@PPy/CFs composite paper was prepared by selecting the ratio of raw materials with the highest photocatalytic efficiency and changing the addition sequence of pyrrole and copper sulfate.The formaldehyde removal ratio was 82.02%when the irradiation time was 4 h.Compared with the previous PPy/Cu2O@CFs,the deposition sequence of PPy and cuprous oxide had a slight effect on the photocatalytic degradation of formaldehyde.In the formaldehyde removal experiment,MnO2 can catalytically oxidate formaldehyde in the air because of the strong oxidizing property of MnO2 itself.After manganese dioxide was compounded with conductive polymer,the conjugated ? structure of the conductive polymer promoted the photocatalytic reaction of the semiconductor and the catalytic oxidation and the photocatalytic reaction of manganese dioxide were occurred simultaneously.Therefore,the formaldehyde removal effect of CP/MnO2@CFs composite paper was better.The composite papers made from Cu2O and CPs had the property of photocatalytic degradation for formaldehyde,and had certain inhibition effect on Escherichia coli and Staphylococcus aureus.However,CP/MnO2@CFs composite papers did not have this property.Therefore,the composite papers made from CPs and Cu2O had great potential in the field of anti-mildew and antibacterial decorative paper.The two functional composite papers prepared in the above experiments are green and environment-friendly,and have broad application prospects in the field of home decoration and construction.